Miscellaneous Intelligence. 395 



will be a new source of difficulty for the unlucky field-geologist 

 who is striving to carry all the details of petrographic classifi- 

 cations into field practice. 



In regard to the femic differentiates of the new series, Rosen- 

 busch says that to separate, in the gabbro family, those which 

 belong to the new series from those of the old, mentioned above, 

 is at present impossible. 



Whether the reader agrees with the ideas of classification which 

 characterize the author's work or not, the volume still remains as 

 before, the indispensable handbook, the best, digested treatise of 

 the literature, the needed work of reference that every working 

 petrographer must have. The added matter covers what has 

 appeared during the last ten years and brings the work down to 

 date. Perhaps the most notable feature which the survey of it 

 reveals is the very great amount of work, during this time, which 

 has been done upon the alkali rocks and the great extension which 

 our knowledge of them has received. 



The appearance of the second half of the, work will be awaited 

 with great interest. l. v. p. 



8. Hendersonville Meteorite. — An account of the new meteorite 

 from Hendersonville, North Carolina, was given in this Journal 

 byL. C. Glenn in 1904 (vol. xvii, p. 215). Dr. G. P.Merrill now 

 gives a detailed account of its mineralogical composition and 

 micro-structure, with a series of analyses by Wirt Tassin. It is 

 characterized by the presence of numerous spherulitic chrondules 

 of radiating and cryptocrystalline enstatite, with also others of 

 the ordinary' porphyritic type of enstatite and olivine. Certain 

 peculiarities of structure are similar to these of the Kernouve 

 meteorite which have been ascribed to mechanical trituration and 

 resintering from a subsequent elevation of temperature. — Proc. 



XT. S. JSFat. Mils., xxxii, pp. 79-82. 



9. Reproduction Artificielle de Mineraux cm xix & siecle / 

 par Pierre Tchiruwinsky. Pp. 637, lxxxiii, with 22 plates. 

 Kieff : 1903-190(3. — This very important volume contains a com- 

 plete and careful summary of the work accomplished during the 

 nineteenth century on the artificial reproduction of mineral 

 species. How exhaustively the author has accomplished his work 

 can be seen from the survey of the list of chemists and mineral- 

 ogists whose 'results have been cited. The work is published in 

 the Russian language but includes a brief resume in French. 



TV. Miscellaneous Scientific Intelligence. 



1. National Academy of Sciences. — The annual spring meeting 

 of the National Academy was held in Washington on April 16-18 ; 

 forty members were in attendance. The following officers were 

 elected : President, Ira Remsen ; Vice President, Chas. D. Wal- 

 cott ; Home Secretary, Arnold Hague. The new members elected 

 are as follows : Joseph P. Iddings, Chicago ; F. P. Mall, Balti- 

 more ; Harmon N. Morse, Baltimore ; Elihu Thomson, Institute 



